Automatic coupling unit for investigation of well
FIELD: oil and gas industry.
SUBSTANCE: automatic coupling unit is equipped with the cylinder connected to hook sleeve, and a spring. Guide and mating parts are provided in the cylinder with possibility of engagement with the hook sleeve. The latter is installed on the contact housing fixed in the housing representing a cylindrical part so that sleeve is pressed to the housing by means of a spring. At that, fluoroplastic insulating tube and a pin is installed in the contact housing. Pin is connected to cable clamp connected to the first cable head by means of logging information cable. Measuring instrument is suspended on the cable which is connected to non-return valve. Cylinder is fixed on the second cable head.
EFFECT: enlarging functional capabilities owing to performing the investigation without stopping the well by automatic coupling unit; improving its reliability.
The invention relates to the oil and gas industry, in particular the geophysical devices and methods for exploration wells, and can be used for exploration wells under the current artificial lift device without stopping the equipment.
There is a method of research wells (RF patent No. 2384698, EV 47/10, G01V 5/04, 20.03.2010), including the equipment of the well casing tubing, the injection of the working agent string of tubing into the reservoir for 3 or more days, stop wells, conducting technological exposure within 1-2 days, gamma logging and thermometry of the column tubing for the registration of the background curve of the temperature distribution along the depth of the well, pumping the first disturbing amount of water through the column tubing or annular space into the reservoir, re-borehole thermometry and check the curve of the temperature distribution along the borehole depth, analyzing data and making conclusions about the state of the well, while the base of the column tubing is placed above the top of the perforated interval 10-30 m, when pumping disturbing amount of water repeatedly move the devices from the borehole bottom to the interval set at 40-60 m above the base of the Colo is by tubing, at different speeds and record the readings of the flow meter, resume water injection and water injection lift devices to the wellhead with the registration of the readings of thermometer and flow meter, pump the second disturbing amount of water and record infrared images around the wellbore after 5-10 min after stopping the injection.
The disadvantage of analog is the complexity of the method and limited functionality due to the shutdown of wells for the study.
Known automatic coupling device for connecting the piston rod of the pump with a column of rods in the study wells (RF patent No. 31397, EV 17/02, 10.08.2003)containing a bushing associated with the plunger performed in the upper part of the groove, the collet with petals and a shank with a tapered part connected to the coupling with the column rods, and the ends of the petals collets are jagged ledges towards the centre, and the tapered portion of the shank is made of corrugated.
The disadvantage of analogue is the limited functionality of the coupler due to the stop of the equipment when performing research.
The closest in technical essence and the achieved technical result of the claimed is a method of measuring downhole parameters (the home is and the Russian Federation No. 2008130459, EV 45/00, 27.01.2010), including the descent into the production casing of the pumping wells, with one or more layers on the string of pipe corresponding underground layout for exploration or exploitation, and at least one of the measuring system in the form of a measuring transducer with independent transmitter and receiver, with a wet upper end, and is placed in the housing with open or closed passage and descend into the production casing of the well together with the underground layout, and includes an eccentric on the depth or above, or below at least one of the investigated layer, and measuring transducer with a transmitter for inclusion in the work registers in time to the corresponding well depth parameters of the environment: any urban environment - the injection of the working agent into the reservoir or flow rate of fluid from the reservoir, or pressure, or differential pressure, with or without temperature, and then transmits the measured values to the receiving device by direct contact, through a connection between their wet the lower and upper ends, while the receiving device is in the form of removable Autonomous receiver down into the well with the help of cable equipment and ensure its contact with the measuring device, the connection between a wet bottom and top ends.
The disadvantage is near what about the analogue is the complexity of the method and limited functionality, due to the absence of the possibility of longitudinal displacement measuring instrument along the borehole during the study and measurement of natural gamma-ray activity of the surrounding rocks.
The closest in technical essence and the achieved technical result of the claimed device is an automatic coupling device (patent RF №67167, EV 17/02, EV 17/06)consisting of connected with a pump of a hook, provided with a locking protrusion, and the trap containing the cylinder on the inner surface of which is made screw-thread, passing in the oval locking groove under the castle ledge, sleeve, guide means, spring and tube.
The disadvantage of the closest analogue is the limited functionality of the coupler due to the stop of the equipment when performing research, and the low reliability of the device in the mode of operating the well.
The objective of the invention is the extension of functionality by conducting research without downtime by automatically coupling under the current system of mechanized production.
The problem is solved also by the fact that in an automatic coupling device for exploration wells containing cylinder connected to the sleeve of a hook, spring, according from what retenu in the guide cylinder is made and mate with the possibility of engagement with the sleeve, a hook, which is installed on the body of the contact, fixed in the housing, which is a cylindrical part, so that the sleeve is pressed against the spring case, while in the case of the contact set fluoropolymer insulating tube and a rod associated with a cable clamp connected to the first cable head through logging data cable, which is suspended from the measuring device and which is connected with a check valve, and a cylinder mounted on the second cable head.
The invention is illustrated by a drawing of the General form (1).
Automatic drawbar (figure 1) contains a receiver case 1, located in the bore and coupled by coupling with 2 centralizer 3, through which is fixed to the electric submersible pump (ESP), tubing (tubing) 4 fixed in the housing of the receiver 1. Channel ESP - Adapter - receiver - Pipe tubing is designed to supply fluid to the wellhead. In the case of the receiver 1, the saddle 5 reinforced threaded and sealed with two rubber o-rings 6. In the saddle 5 and the conical surface has a nipple 7. The nipple 7 is threaded for mounting in the housing of the receiver 1 and two sealing rings 6, the inside of the nipple 7 is made the hole for logging data cable 8. To install the seal is 9 in the case of the receiver 1 is screwed into the bolt 10, and to prevent the flow of fluid in the emergency channel is made non-return valve 11. The nipple 7 has a housing 12, which is a cylindrical part, which is fixed to the first cable head 13. Between the first cable head 13 and the housing 12 is installed first washer 14. The sleeve 15 is installed between the first and second washers 14, in which the cable clamp 16. In case 12 screwed in the body of the pin 17 and is sealed by two rings 18. In case of contact 17, before screwing into the housing 12, mounted sleeve of a hook 19, the stop 20, the sleeve 21, the spring 22, washer 23, which rests on the housing 12 under the action of the spring 22. In the case of the pin 17 is installed fluoropolymer insulating tube 24 and the rod 25 connected with cable clamp 16 which is connected with the first cable head 13 by means of logging information cable 8, which is suspended from the measuring device 26. On the second cable head 27 is fixed to the cylinder 28 connected to the sleeve of a hook 19, which represents a response part. In the cylinder 28 is made of shaped channels (not shown).
The device operates as follows. Receiver 1 is set through the centralizer 3 clutch 2 on ESP in the housing under the action of tension force logging information cable installed seat 5 and the housing 1 when obosom contact 17. For the implementation of snagging on logging information cable omit the second cable head 27, with swirling it on the thread cylinder 28, which is made of profiled channels, limiting movement of the sleeve hook 19 within the cylinder 28. When lowering the cylinder 28 on the body of the pin 17 is an emphasis in the upper bounding surface on which the sleeve of a hook 19 can be turned and fixed in a certain position. At this point is the connection of the rod 25 with the contacts of the second cable head 27 and thus is an electrical circuit of the measuring channel. After you close the electrical circuit for the implementation of the test layers at different depths, the measuring device 26 raise in the following sequence: logging the communication cable 8, with a fixed second cable head 27 and the cylinder 28, rise up. Sleeve of a hook 19 enters the thrust surface of the cylinder 28 and lifts the body of the pin 17, the housing 12, the nipple 7 and logging the communication cable 8, which is fixed to the measuring device 26.
After research design is lowered. The nipple 7 sits on the tapered surface of the seat 5, and the cylinder 28 starts to fall, and the body of the pin 17 remains in a fixed position, due to the emphasis Kon is e.g. in the saddle 5. Sleeve of a hook 19 falls on the guide surface and, turning, rests on the cylinder 28. To effect the separation of the contact cable head 27 with the cylinder 28 begin to raise up the sleeve of a hook 19 falls on the guide surface and enters the exit channel of the cylinder 28. The cylinder 28 is designed so that the process of coupling and uncoupling with the sleeve of a hook 19 is semi-automatically with the reciprocating movement of the logging data cable 8 along the tubing 4. Coupling and automatic coupling is performed repeatedly in research wells, and whether ESP works or not.
In the course of the study wells may experience an abnormal situation associated with the breakage of logging information cable. In the event of breakage of the logging data cable 8 there is a leakage of the working fluid in the casing 1 into the wellbore on the channel where you installed the seal 9. This case provides a check valve 11, which passes through a wireline communication cable 8 and which locks the cavity with seals 9 and eliminates leakage of the working fluid.
Automatic coupling device for the study of wells containing cylinder connected to the sleeve of a hook, a spring, characterized in that the cylinder is made napravlyaushaya mate with the possibility of engagement with the sleeve, a hook, which is installed on the body of the contact, fixed in the housing, which is a cylindrical part, so that the sleeve is pressed against the spring case, while in the case of the contact set fluoropolymer insulating tube and a rod associated with a cable clamp connected to the first cable head through logging data cable, which is suspended from the measuring device and which is connected with a check valve, and a cylinder mounted on the second cable head.
FIELD: oil and gas production.
SUBSTANCE: electronic module of bottomhole telemetric system consists of switchboard, of protective jacket, and of electronics chassis with converters unit mounted on vibro-isolators on both sides and fixed with pins from turning. Between the said chassis there is introduced an additional vibro-insulator. The said vibro-insulators are arranged on set bushes fixed with screws from turning and they are equipped with an up-thrust nuts. Internal surface of the protective jacket in upper and lower sections is made correspondingly with upper and lower slots oriented in one plane. A lower section of the protective jacket is equipped with an end in form of a bush with a screw set in the lower slot and with an element for extracting the protective jacket of the electronic module from the case of the bottomhole telemetric system. An upper part of the protective jacket is connected to the switchboard by means of successively set the nut and the bush with a pin installed in the upper slot. Additionally the chassis with the converters unit is furnished with additional vibro-insulators.
EFFECT: reduced detrimental effects of impact and vibration loads on electronic modules of downhole instrument.
SUBSTANCE: device comprises geophysical cable, facility of transportation, connected to hydraulic rupture facility. According to invention, transportation facility is arranged in the form of hydraulic propeller connected by common shaft to drive and high-voltage generator, installed inside closed sealed vessel. This vessel is in its turn installed inside jacket with formation of circular gap. At the same time high-voltage generator is arranged with piezoelectric plates.
EFFECT: improved efficiency of hydraulic rupture by increasing efficiency of perforation facility delivery, intended for hydraulic rupture of beds into horizontal or inclined well.
FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil industry and can be applied in dual operation of two beds in the same well. The unit comprises a power drive, a driving element, a packer and fluid lifting lines with parallel tubing string columns lowered in the well. The unit accommodates a parallel anchor with apertures for cables and tubing string columns, eccentric guides fixed by centering clips on auxiliary branch built in the long tubing string column, bottomhole apparatuses connected to cables and arranged above and below the packer. Each guide has apertures for the cables and an aperture with the top deepened inside in the form of a funnel for the short tubing string column.
EFFECT: invention ensures coupling of the short tubing string column with the parallel anchor and prevents damage of cables.
FIELD: oil and gas production.
SUBSTANCE: downhole equipment centraliser comprising a hollow rod with a socket end, a coupling, a cylinder, a piston pusher and rams partially radially movable forward when travelling along the tapered case. Besides the coupling is provided from beneath; from the top, the hollow rod is equipped with a landing seat, and the cylinder wherein all the movable elements are provided, comprises ram windows and seats between the coupling and the landing seat while being designed to rotate and join a centre tube of the hollow rod; the tapered case is rigidly connected with the piston pusher spring-assisted from beneath to travel longitudinally downwards and rotate about the hollow rod.
EFFECT: rigid and reliable centering of the downhole equipment in the required interval.
FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil producing industry and is designed for generating pressure pulses in drilling agent in drill string and for measurements during drilling. For this purpose the bell of the pulse generator travels up and down to shift drilling agent from pressure reservoir into a chamber of sliding pressure and out of it and along corresponding upper and lower connecting channels. The bell is actuated by means of certain sequence of manipulations performed with solenoids with a bidirectional disk valve. The circular channel of the pulse generator is designed to decrease turbulence of drilling agent flow and to generate practically laminar flow in a pulsation region. A pulse or absence of a pulse is converted into a digit signal transmitted to surface with a pressure sensor implementing algorithm of decoding. Further a signal is visualised by a drill foreman and operators who obtain valid data about direction and geologic formation; these data assist an operator in determining direction of drilling. Additional pulse generators increasing rate of data transmitting can be introduced in the given instrument. Raised velocity of data transmitting facilitates obtaining more thorough information, decreases drilling expenditures and increases yield of oil deposit.
EFFECT: raised information value and reliability of methods and facilities due to insensitivity of facility to flow velocity and pressure; skipping over adjustment during operation; forming recognisable, repeated, reproducible and pure signals of pressure pulses at minimal consumption of power.
37 cl, 4 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: telemetric system sound bottom support includes a bottom sub, an electric module protected jacket and a centraliser. At that the centraliser executed as two co-axial elements with radial connections in between. The centralisers internal element is elongated in comparison with an external one, and in the centralisers internal element top part executed a blind hole along its axis, where an elastic element installed, made of non-magnetic material. The elastic element made of titanium or non-magnetic steel, or bronze, or metal rubber, or rubber.
EFFECT: sound bottom support parts lifetime increase, assembly simplification and its reliability increase, the support spare parts and its assembling work content decrease.
4 cl, 1 dwg
FIELD: metering equipment.
SUBSTANCE: invention is related to survey of underground formations with application of acoustic measurements performed in well. For this purpose body of acoustic logging tool is made as configured for isolation of receiving elements and electronics in acoustic receiver unit against well environment. At the same time body has an interrupted, alternating structure, which acoustically non-transparent in some zones and acoustically transparent in the others. Body may be modular, with several steps joined one to another. Multiple steps provide for the body that may be used with multiple well logging tools for reduction or elimination of noise transfer to receiving elements.
EFFECT: improved efficiency of survey by elimination of interfering signals and provision of adequate mechanical strength of acoustic logging tool.
47 cl, 9 dwg
FIELD: oil and gas production.
SUBSTANCE: invention refers to oil industry and can be implemented at survey of wells. The method of evaluation of static and dynamic levels of fluid in annular space of a well equipped with an electric centrifugal pump includes evaluating of levels by geo-physic methods. Prior to evaluation of levels a hole is made in a face plate. A perforated plastic pipe narrowed in its lower part and secured on external surface of a flow string is lowered together with the flow string and the pump into the well. Bottom of the plastic pipe is arranged 0.5-1.0 m above the pump; an upper end of the plastic pipe comes out to surface through the hole in the face plate. A gap between the plastic pipe and the hole of the face plate is leak proofed; a measuring tape with a level sensor is lowered inside the plastic pipe. Surface of fluid is contacted; a level is measured and the measuring tape is withdrawn out of the plastic pipe.
EFFECT: simplification of measuring procedure of fluid level.
SUBSTANCE: invention relates to mining and is provided predominately for subsurface video surveillance, particularly for implementation of visual verification and automated flaw detection of condition of boreholes. Device for video surveillance of well includes sealed outboard unit with video camera and hermetic enclosure, which contains lamp, unit of secondary current supply, remote sensing unit, unit of input and sealing of hoist cable and electric signals converter. Additionally outboard unit additionally contains radiator, linked to environment, heat-conducting container, into which it is placed video camera and coolant, based on the Peltier effect.
EFFECT: providing the ability of video surveillance of boreholes in conditions of elevated temperature.
2 cl, 1 dwg
FIELD: oil industry.
SUBSTANCE: system consists of upper cable plug (UCP) and lower cable plug (LCP) and a body. At that, UCP is provided with cable cords (CC) uniformly located in a circumferential direction and covered with an insulation material, and plugs without being insulated are installed on CC ends. Body is provided with CC uniformly located therein in a circumferential direction, on top ends of which there installed without insulation and located in the body cavity are tips, and with a gasket with holes for CC. At that, LCP is provided with CC covered with insulation material and uniformly located in a circumferential direction and with a flange wherein two holes for mounting elements are made. In UCP and LCP body insulators with holes for CC are located. Seal rings are located in the joints between UCP and the body along the mating cylindrical surfaces. Body and LCP are provided with seal rings located on their external surface, and UCP is provided with a flange with two holes for mounting elements. Body is made in the form of a shell inside which insulators are located with CC uniformly located in a circumferential direction and equipped with limit stops preventing their axial movement. At the shell bottom there made are holes for CC covered with insulation material for LCP and coaxial relative to CC located in the body. Upper part of the shell is made in the form of a hollow cylindrical sleeve coming out of the flange provided with two holes for attaching the mounting elements and coaxial relative to the holes made on UCP flange. Gasket is located in the upper part of the body and locks insulators, and its holes are made for CC covered with insulation material for UCP and are coaxial relative to CC located in the body, on lower ends of which the tips are installed without insulation. Plugs without LCP insulation are installed on CC ends. Tips are collet-type and are provided with spring rings. All joints of tips and plugs with CC ends are threaded.
EFFECT: providing reliability and efficiency of the system for connecting the submersible electric motor to the power cable on the well's top, protected against action of the well's corrosive medium and delivered to the site with maximum availability.
FIELD: oil and gas industry.
SUBSTANCE: thermal manometric system includes the housing in which there located is at least one fluid pressure and temperature gauge the measuring part of which is connected to external part of the housing. Moisture metre, flow metre and electronics unit connected to tight current lead and sensors of thermal manometric system with flow metre and moisture metre are located in the housing as well. System is equipped with flow-through cylinder coupling connected to the housing and provided with possibility of being adjoined to tubing string. At that, in the coupling there located is tight current lead having the possibility of being connected to logging cable. At least one fluid pressure and temperature gauge the measuring part of which is connected to external surface of the coupling is located in the coupling as well.
EFFECT: improving measuring accuracy of fluid parameters both inside the tubing string and in annular space.
8 cl, 2 dwg
FIELD: electric engineering.
SUBSTANCE: the invention relates to electric engineering and is used to supply power to well equipment. The well generator comprises a protective casing, electric socket, at least one attachment fitting, a rotor with a hydroturbine, permanent magnets, furthermore, the rotor and actuating coils are fixed inside the protective casing, magnets and actuating coils have circular shape and are positioned inside a cylinder with alternation and axial clearance between them. The generator has an additional rotor installed concentrically with the first rotor and connected with it through a reductor. The second rotor ahs a disc with soft magnetic inserts, which is positioned between the actuating coil and permanent magnet. The well generator contains at least one pressure and temperature expansion compensator, linked with the driving clutch.
EFFECT: simplification of the well generator design, increased reliability and power output while reducing the generator size and weight.
3 cl, 4 dwg
SUBSTANCE: the invention relates to geophysics and is used for to carry out complex geophysical inspection of oil and gas wells, operated with a horizontal bore. The complex device for well inspection can be descended into the well bore by means of logging cable. The device comprises a cylindrical casing fitted with level stabilizer which centers the device along the well axis. The stabilizer has at least six levers. Each level has at least one fluid flow temperature sensor, at least one influx thermal indicator and at least one fluid composition sensor which are distributed along the perimeter of the well bore in one line parallel to the device axis. The casing is fitted with additional upper lever stabilizer in the tail-end of the device.
EFFECT: increased information content, increased device efficiency, expanded capacities in foliated multi-phase flow.
6 cl, 2 dwg
FIELD: electric engineering.
SUBSTANCE: The invention relates to electric engineering and is used for supplying power to well equipment. The well generator is fitted with protective casing, electric socket, at least one attachment fitting, a rotor with a hydroturbine, permanent magnets and actuating coils, tightly fixed inside the protective casing. The hydroturbine is birotating. There is an additional rotor with permanent magnets fixed on its end faces, installed between the protective casing and the rotor. There is a disc with radial grooves fixed on the rotor, magnetic inserts are installed in these grooves. Furthermore, the disc is installed between actuating coils and permanent magnets. The second birotating turbine stage is fixed on the additional rotor. Another disc can be fixed on the rotor between the actuating coils and protective casing, the said disc can also be fitted with magnetic inserts. The inner generator space can be divided into two spaces: upper space and lower space. The upper space is filled with lubrication fluid. The top of the rotor can have a hole for feeding lubrication fluid to the upper space. The generator may contain at least one pressure and temperature expansion compensator, linked with the upper space.
EFFECT: increased reliability and power output of the generator while reducing size and weight.
6 cl, 6 dwg
FIELD: oil and gas industry.
SUBSTANCE: the invention relates to oil and gas industry and is used to measure density of drilling fluid and cementing slurry used in well construction. A radiation-proof emitter is installed on piping, and a detachable detector is installed on the piping element chosen for measurement. The density equivalents of solutions with values covering the necessary measurement range are prepared. The density equivalents are calibrated according to the initial calibration chart obtained with standard solution samples. The density equivalents are used for periodic calibration which requires placement between the emitter and density equivalent detector. Measurement data is registered, the calibration dependence chart is compiled. Furthermore, the initial calibration, the calibration of density equivalent and the periodic calibration with density equivalents is carried out with the pipe element separated from the piping or with an imitation of pipe element. Density equivalents are injected into the pipe element with the possibility of their successive fixation in relation to the pipe element faces in the detector sensitivity zone during measurement data registration.
EFFECT: increased accuracy of nuclear density meter calibration in the field, simplifying and reducing cost of metrological operations.
2 cl, 3 dwg
FIELD: construction machinery.
SUBSTANCE: invention is designated for locating of mandrills and bores in the ground; the alternating low-frequency magnetic field is induced by the emitter which is rigidly connected with the mandrill or bore; the emitter is executed in the shape of identical, coaxial, phasing-out inductance coils located along the axis of the mandrill; the differential diagram of the aerial directivity is formed cumulatively; the aerials are moved on the surface and define the position wherein the difference signal is equal to null; by orientation of the aerials in these positions they determine the plane position squire with the axis of the mandrill or the bore and the vertical plane coinciding with the direction of mandrill or bore axis; the line of intersection of the vertical plane with the ground surface is to be found; the course is to be determined regarding the direction of the above line; the pitching is determined by the angularity to the ground surface plane squire with the axis of the mandrill or bore; the device contains the emitter of the alternating low-frequency magnetic field, two identically oriented aerials and the receiver having two receiving channels and indicators; the aerials outlets switched to the inputs of the signals sums and differences receiving device and its outlets connected to the inputs of the receiving summarizing and differentiating channels; the outlet of the differentiating channel is switched to the input of the first indicator; the outlet of summarizing channel is switched to the input of the second indicator.
EFFECT: enhancement of accuracy of determination of mandrills and bores pitching and the emitter construction simplification.
2 cl, 6 dwg.
FIELD: drilling operation.
SUBSTANCE: invention belongs to the clarification of the fact, when the drilling was stopped within the drilling operation. The method of such a clarification includes the observation of the first sensor signal within the first chosen time interval, observation of the second sensor signal within the second chosen time interval and analysis of the noise level in order to specify whether the noise had changed in the course of the second signal.
EFFECT: assessment of noise within the well for the purpose of clarification of the fact, when the sump pump started its operation.
15 cl, 5 dwg
FIELD: well surveying.
SUBSTANCE: invention belongs to the well surveying. For this purpose the submersible pumping systems, containing an electricity-driven submersible pump in the bore hole, is used. The passing of logging equipment is fulfilled within the inner electrical submersible pump passage up to the position below the inner passage way of the electrical submersible pump at the time of exploitation of such a pump inside the bore hole. According to the second scheme the logging equipment is shifted through the inner lengthwise passage and through the motor shaft of the electrical submersible pump system, located within the bore hole, up to the position beneath the inner lengthwise passage. The borehole fluid is extracted through the flow passage, not being a part of the inner lengthwise passage during the shift of the logging equipment along the inner lengthwise passage. Well logging system includes electrical submersible pump system, having the inner flow passage, going through the electrical submersible pump in order to receive the logging equipment system. The logging equipment system is fulfilled with the possibility of electrical submersible pump passing along the inner flow passage up to the position below the inner passage way of the electrical submersible pump. The electrical submersible pump contains a flow fluid passage, separated from the inner flow passage in such a way, that the inner flow passage do not receives the fluid flow.
EFFECT: enhancement of the well exploitation efficiency by means of well logging procedures beneath the well equipment point from inside the bore hole.
18 cl, 6 dwg
FIELD: oil-and-gas production.
SUBSTANCE: in compliance with this invention, thermal flowmeter is used to measure flow rates along well bore in direction coinciding with fluid flow directions and make measurements in killed well. Results of said measurements are used to construct graphs of thermal flowmeter readings vs its displacement speed to determine fluid flow rate in well.
EFFECT: expanded range of flow rate determination.
2 cl, 3 dwg, 1 ex
FIELD: oil-and-gas production.
SUBSTANCE: proposed method comprises forcing working medium into bench and measuring bottom hole pressure. Bench exposure zone in well is isolated by packers from top and bottom. Hot has or overheated steam is used as working medium. Bench pressure is controlled at well mouth during working medium injection by measuring pressure in tubes communicated with interpacker space. Note here that, at a time, pressure at well mouth in tubing used for working medium injection. Control over working medium breakthrough is performed using the increase in difference between tubing pressure and bench pressure.
EFFECT: control over oil deposit development by injection wells and preventing working medium breakthrough.
FIELD: mining industry.
SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.
EFFECT: optimized well operation.